为什么SetupDiEnumDriverInfo为驱动程序提供两个版本号 [英] Why does SetupDiEnumDriverInfo give two version numbers for my driver

问题描述

我正在尝试以编程方式获取驱动程序的版本号。似乎是通过使用 SetupDiEnumDriverInfo 来获得 SP_DRVINFO_DATA 结构并检查 DriverVersion字段来完成的。

I'm trying to get the version number of a driver programmatically. The seems to be done by using SetupDiEnumDriverInfo to get a SP_DRVINFO_DATA struct and inspect the DriverVersion field.

以下代码有效，但是对于同一驱动程序返回两个不同的版本。我的设备是带有单个.sys文件的自定义USB设备。我的机器上只有一台设备连接。我指定 DIGCF_PRESENT 仅查询当前连接的设备的驱动程序。

The following code works, but returns two different versions for the same driver. My device is a custom USB device, with a single .sys file. There is only one device connected to my machine. I specify DIGCF_PRESENT to only query the drivers of currently attached devices.

int main(void)
{
    // Get the "device info set" for our driver GUID
    HDEVINFO devInfoSet = SetupDiGetClassDevs(
                              &GUID_DEVINTERFACE_USBSPI, NULL, NULL,
                              DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);

    // Cycle through all devices currently present
    for (int i = 0; ; i++)
    {
        // Get the device info for this device
        SP_DEVINFO_DATA devInfo;
        devInfo.cbSize = sizeof(SP_DEVINFO_DATA);
        if (!SetupDiEnumDeviceInfo(devInfoSet, i, &devInfo))
            break;

        // Build a list of driver info items that we will retrieve below
        if (!SetupDiBuildDriverInfoList(devInfoSet, 
                                        &devInfo, SPDIT_COMPATDRIVER))
            return -1; // Exit on error

        // Get all the info items for this driver 
        // (I don't understand why there is more than one)
        for (int j = 0; ; j++)
        {
            SP_DRVINFO_DATA drvInfo;
            drvInfo.cbSize = sizeof(SP_DRVINFO_DATA);
            if (!SetupDiEnumDriverInfo(devInfoSet, &devInfo, 
                                       SPDIT_COMPATDRIVER, j, &drvInfo))
                break;

            printf("Driver version is %08x %08x\n", 
                   (unsigned)(drvInfo.DriverVersion >> 32), 
                   (unsigned)(drvInfo.DriverVersion & 0xffffffffULL));
        }
    }

    SetupDiDestroyDeviceInfoList(devInfoSet);

    return 0;
}

在我的机器上打印：

Driver version is 00000000 000015d3
Driver version is 00020004 00000000

在朋友的机器上打印：

Driver version is 00020004 00000000
Driver version is 00020004 00000000

第二行与设备管理器报告的数字匹配。

The second line matches the number reported by device manager.

免责声明：我之前曾问过类似问题。这是一个新问题，为什么SetupDiEnumDriverInfo返回多个驱动程序版本。

Disclaimer: I previously asked a similar question. This is a new question about why SetupDiEnumDriverInfo returns more than one driver version.

推荐答案

在编写代码时，所有可能的驱动程序将被输出。尝试执行以下操作仅对已安装的驱动程序进行筛选：

As your code is written, all the possible drivers will be output. Try doing the following to filter on only the installed driver:

SP_DEVINSTALL_PARAMS InstallParams;
if ( !SetupDiGetDeviceInstallParams( devInfoSet, &devInfo, &InstallParams ) )
{
   //Error
}
else
{
   InstallParams.FlagsEx |= DI_FLAGSEX_INSTALLEDDRIVER;
   if ( !SetupDiSetDeviceInstallParams( devInfoSet, &devInfo, &InstallParams) )
   {
      //Errror
   }
}

我在 http://doxygen.reactos.org/df/db2/dll_2win32_2devmgr_2misc_8c_a1cd0b33c1785392a37689433dc99e482.html

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